Pope John IV

Pope John IV (577-12 October 642) was Pope from 640 to 642, succeeding Pope Severinus and preceding Pope Theodore I.

Biography
John was born in 577 in Dalmatia, Lombard Kingdom to a family of Romans. He was consecrated as pope in 640 AD after the death of Pope Severinus, and he had to deal with the invasions of the Slavs. John condemned Monothelitism as heresy, and he apologized to Emperor Constantine III of Byzantium for his father Heraclius' mistaking of Pope Honorius I's statements for making it seem as if he was a Monothelite.